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History
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Cozy
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US3876984A - Apparatus for utilizing an a.c. power line to couple a remote terminal to a central computer in a communication system - Google Patents
A system for interfacing a telephone party line extending from a central computer with a number of remote inquiry terminals. The system includes an a.c. power line disposed between the party line and the remote inquiry terminals, a line buffer modem (modulator/demodulator) connected between the party line and the power line, and a plurality of terminal modems each being associated with a one of the remote inquiry terminals and connected between the power line and the respective remote inquiry terminal. The communication signals received from a telephone party line are applied to the line modem connected to that line and transformed to a suitable form for transmission over an a.c. power line. The signals are then applied to the power line. The remote terminal modems transform the signal received from the power line back to suitable form for receipt by its associated remote terminal. Similarly, signals from the various remote terminals are transformed by the associated terminal modems to a form suitable for transmission and then transmitted over the a.c. power line to the line modem, where they are again transformed into signals suitable for retransmission over the telephone party line to a central computer.
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SFE: Perry, Steve
Entry updated 13 January 2025. Tagged: Author. (1947- ) US author, father of S D Perry, who began publishing sf with "With...
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Carbon Disclosure Project - Wikiwand
The CDP (formerly the Carbon Disclosure Project) is an international non-profit organisation based in the United Kingdom, Japan, India, China, Germany, Brazil and the United States that helps companies,...
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Papal election, 1292–1294
The papal election from April 5, 1292 to July 5, 1294 was the last papal election which did not take the form of a papal conclave. After the death of Pope Nicholas IV on April 4, 1292, the eleven surviving cardinals (a twelfth died during the…